128766960242 has 18 divisors (see below), whose sum is σ = 195413596749. Its totient is φ = 63637741200.

The previous prime is 128766960233. The next prime is 128766960277. The reversal of 128766960242 is 242069667821.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 115103454361 + 13663505881 = 339269^2 + 116891^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=253739.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 45164117 + ... + 45166967.

Almost surely, 2^128766960242 is an apocalyptic number.

128766960242 is a deficient number, since it is larger than the sum of its proper divisors (66646636507).

128766960242 is an frugal number, since it uses more digits than its factorization.

128766960242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5882 (or 2942 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 53.

The spelling of 128766960242 in words is "one hundred twenty-eight billion, seven hundred sixty-six million, nine hundred sixty thousand, two hundred forty-two".